Practical_modern_SCADA_protocols_-_dnp3,_60870-5_and_Related_Systems

206 Practical Modern SCADA Protocols: DNP3, 60870.5 and Related Systems
For example, M_ME_TA_1 is monitored information, a measured value, with time tag,
and type A, which is a normalized value with quality.
Type No. Description Reference
not defined
single-point information M_SP_NA_1
single-point information with time tag M_SP_TA_1
double-point information M_DP_NA_1
double-point information with time tag M_DP_TA_1
step position information M_ST_NA_1
step position information with time tag M_ST_TA_1
bitstring of 32 bit M_BO_NA_1
bitstring of 32 bit with time tag M_BO_TA_1
measured value, normalized value M_ME_NA_1
measured value, normalized value with time tag M_ME_TA_1
measured value, scaled value M_ME_NB_1
measured value, scaled value with time tag M_ME_TB_1
measured value, short floating point number M_ME_NC_1
measured value, short floating point number with
time tag
M_ME_TC_1
integrated totals M_IT_NA_1
integrated totals with time tag M_IT_TA_1
event of protection equipment with time tag M_EP_TA_1
packed start events of protection equipment with
time tag
M_EP_TB_1
packed output circuit information of protection
equipment with time tag
M_EP_TC_1
packed single-point information with status change
detection
measured value, normalized value without quality
descriptor
reserved for further compatible definitions
Table 8.13a
ASDU types – process information in monitoring direction
M_PS_NA_1
M_ME_ND_1
Table 8.13b shows types that were added to this category with amendment 2 of IEC
60870-5-101. These provide for a longer time tag format.